Hi I have loved a guy and I have been have sex with him for past last six moth I have not keep sex with him . Now if a doctor checks me the doctor can find me

The doctor can find you what?

If he put his penis in your vagina you are no longer a virgin. No questions about it. No discussion.

Intercourse = loss of virginity

I think what she meant to ask, if the doctor (a regular doctor or a gyn) see her from "down under" can they figure out of she had sex or not.

It can be possible for the doctor in doing a check up to tell. But then people who are old enough and responsible enough to be having sex should be OK, Plus a person having regular sex, would have already been to the doctor and be on birth control.